Albert hirscii



(No Model.)

A. HIRSCH.

APPARATUS FOR WELDING, BRAZING, AND SOLDERING BY ELECTRICITY. No. 606,342. Patented June 28, 1898.

- Moreover, an electromagnet located in immeis liable to be so injured by the heat that the flame would cease, besides which the use of area ALBERT HIRSC H, OF

BERLIN, GERMANY.

APPARATUS FOR- WELDING, BRAZING, AND SOLDERING BY ELECTRICITY.

SPECIFICATION forming part of Letters Patent No. 606,342, dated June 28, 1898.

Application filed December 21, 1897. Serial No. 662,786. (No model.) Patented in England October 16, 1895, No. 19,442.

To aZZ whom it may concern.-

Be it known that I, ALBERT HIRSCH, engineer, of 23 Liineburgerstrasse, Berlin, Germany, have invented new and useful Apparatus for TVelding, Brazing, and Soldering by Electricity, (for which I have obtained Letters Patentin Great Britain, dated October 16, 1805, No. 19,4i20 of which the following is a full, clear, and exact description.

My invention relates to electric welding, brazing, and soldering by the heat of an electric are, not by the passage of the current through the work, but by causing the arc to assume the form and to act in the manner of a flame whose temperature is graduated in the direction of the length of the flame inversely as the distance from the electrodes and capable of being projected on the work like a blowpipe-fiame. Heretof ore in the production of such a flame-like are it has been customary to employ a magnetic field to defleet the are; but the use of a magnetic field results in such a concentration of the incandescent gases surrounding the are as to prevent the formation of zones of sensibly-differing temperatures, any desired variation of temperature involving a corresponding variation of the intensity of the magnetic field.

diate proximity to and in circuit with the arc the electromagnet involves a waste of electric energy and an increase in the weight and cost of the apparatus. Now if the carbons or other electrodes be placed in an obliquely-convergent position relatively to each other the use of a magnetic field may be advantageously dispensed with.

My invention therefore consists in the means for producing a flame of the character described without the employment of a magnetic fieldthat is, so mounting and operating the electrodes in a tool that they may be adjusted at the required angle and converged, separated, and otherwise manipulated by one hand as to produce, vary, or extinguish the flame, as required by the exigencies of they work.

The tool or apparatus is susceptible of various modifications of form and construction, of which that illustrated in the accompanying drawings may be taken as an example, Figure 1 being a side view, and Fig. 2 a top plan view, of the preferred form of tool.

A A are the two convergent electrodes, preferably earbons,moun ted in clamps or elec- Erode-holders a a, pivoted on the ends of electrode carriers or levers B B, pivoted at I) b, so as to be capable of motion in their common plane, the joints 1) I) being carried by the two parts 0 G of a metal bar or stem connected by an intervening insulating-block C and provided with a handle H The joint I) is stiff 'and is carried by a slide Z1 adjustable along the part 0 by means of a manually-operable micrometer-screw d, mounted in bearings 01, screwing through a nut in the slide 11 and provided with a milled head of insulating material, so that the electrode or carbon A may be adjusted at any required distance from the carbon A, roughly by flexure of the joints or finely by means of the screw. The joint I) is loose and directly on the part 0, and the .lever B and carbon A are capable of motion limited in the outward direction by. an adjustable screw stop a, mounted in a lug e on the part 0 and against which a lug e abuts, the motion being pro duced in one direction by a spring F and in the other direction by a thumb-lever G, faced with insulating material, pivoted on the part C, and connected by a link 9 with a button g, of insulating material, on the lever B, so that by a thrust of the lever G the carbons will be quickly brought together and separated again the proper distance for striking the are.

In order to produce a flame-like arc of the character described, the carbons should be inclined to each other at an angle which may vary between, say, forty and seventy degrees, according to the form of the flame required, the nature and dimensions of the work, and other circumstances of the case, provisions for this variation of angle being made by the various pivotal and other adjustments above described. The insulated leads H H from the source of alternating current are com nected to the binding-screws of the carbonholding clamps.

I claim--' 1. A tool or instrument for use in welding brazing and soldering by the heat of the electric are, consisting in the combination of a pair of carboirholding clamps, such as a a, pivotallyattached toa pair of lever-arms 13 B mounted on insulated portions of the same bar or stem, the one being pivoted to the end of the bar or stem and the other to a slide working on said stem, a micrometer-serew mounted on the stem and adapted to traverse the slide thereon, said screw having a milled head in proximity to the handle of the tool, an adj ustablc stop for limiting the outward angular movement of the carbon-carrying; lever which is pivoted to the end of the stem, a spring connected to the said lever and to the bar or stem so as to produce angular motion of the carbon in the outward direction, a thumb-lever pivoted at the opposite side of the bar to the micronieter-screw and in proximity to the handle of the tool and coupled by a link to the outer carbon-carrying lever so as to act in opposition to the spring for bringing the carbons momentarily together for striking the are, all substantially as specified.

2. In a handtool for electric welding and analogous operations, the combination of a handle, a stem supported thereby, a plurality of electrode-carriers pivoted to the stem, electrodes carried by the carriers and inclined toward each other at an angle and manually operated means for swinging an electrode-car rier so as to bring the electrodes into such position as to strike the arc.

In a tool for electric wcldingor analogous operations, the combination of a stem or sup port, a plurality of electrode-carriers one at least of which is pivotally carried thereby, electrodes carried by the electrode-carriers and inclined toward each other, manuallyoperated means for adjusting one of the electrode-carriers with respect to the other, and

seas 12 manually-operated arc-striking means, substantially as described and for the purposes set forth.

4. In a tool for electric welding and analogous operations, the combination of a plurality of electrode-carriers carried by a common support and provided with electrodes inclined toward each other, one at least of the said electrode-carriers being pivoted to its support and provided with manually-operated means for moving it toward the other electrode-car- 'IIGIS to bring the electrodes into such a position as to form the are, and a spring acting, upon the said electrode-carrier to separate the electrodes to strike the are, substantially as described and for the purposes set forth.

5. In a portable electric welding apparatus, the combination of the following instrumentalities in operative relation, to wit, a handle provided with an eleetrode-support, a pl 11- rality of electrode-carriers carried by the said support and movable with respecttl'lereto, one at least of the said electrode-carriers being pivotally carried by the said support, manual means for manually adjusting one of. the electrodes and 1nanually-operated arc-striking apparatus, the entire structure being, supported from the handle in order to consti-- tute a portable and transportable tool wherein the electrodes are capable of a fine manual adjustment with respect to each other and wherein the arc may be manually struck, snl bstantially as described.

Signed by the said AL'nnn'r liinscn: this Bid day of November, 1897.

ALBERT IIIRSUII',

In presence of- W OLDEMAR IIAUVI, HENRY ILxsrnn. 

